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Harrisburg area Cumberland, Dauphin, and Perry Counties
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Old 10-27-2016, 08:59 AM
Status: "See My Blog Entries for my Top 500 Most Important USA Cities" (set 9 days ago)
 
Location: Harrisburg, PA
1,051 posts, read 978,865 times
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wwhickok - not sure if this helps with your book. It is a cool place, and also helps explain some of the geographical phenomenon in the area (sink holes).

Indian Echo Caverns - is a show cave in Derry Township (Dauphin County) near Hummelstown, Pennsylvania, USA. The limestone caves are open for the public to visit via guided tour. For nineteen years (1802–1821) the caverns were the home of William Wilson, known as the Pennsylvania Hermit. Wilson withdrew from society after his failure to halt the execution of his sister Elizabeth for the murder of her twin sons. Following her death in Chester, Pennsylvania in 1786, William wandered westward across southeastern Pennsylvania, settling in the caverns in 1802. The Sweets of Solitude: Instructions to Mankind How They May Be Happy in a Miserable World, an essay supposedly written by Wilson during his time in the caverns, was published following his death.

The same geological system of which the caverns are a part is responsible for many sinkholes in an area stretching from Hummelstown to as far as Palmyra, and as far south as Middletown.
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